Adjustable lamp



@ct. 14 192% 1151mm M. OZLEK ADJUSTABLE LAMP Filed March 21, 1921 2 Sheets-Sheet 1 Um. M l92$ 11,511,630

M. OZLEK ADJUSTABLE LAMP Filed March 21. 1921 2 Sheets-Sheet. 2

Q 6,? $0 ea K5 hpplioatiou ill ed March at, rear.

To all whom it may concern:

Be it known that l, Monms Oznnn, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Adjustable Lamps, of which the following is a specification.

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Une object of my invention it to provide improved clamaping means which will be operative to a justably secure a lamp in various positions convenient for the user.

Another object is to make my invention of such simple construction that it can be easily manipulated and adjusted.

These Ob ectS, and other advantageous ends which will be described hereinafter,

'l[ attain in the following manner, reference bein had to the accompanying drawings in w 'ch- Figure 1 is an elevation showing a floor elevation of a portion of the lamp shown in Figure 1 andillustrating the lamp-supporting arm in section,

Figure 4 is a section taken on the line 4-4 of Figure 3,

Figure 5 is a section taken on the line 5-5 of Figure 4,

Figure 6 is an enlarged sectional view of the pivotally coupled clamping members shown in Figure 2,

Figure 7 is an enlarged fragmentary section showing my improved post-sup ortin means and taken on the line 'hof sit or Figure lor' Figure 2, and

Fi e 8 is aview of similar character to F1 re 7 showing an. additional spring.

Re erring to the drawings and particularly to Figures 1, 3, 4 and 5, 9 represents a hollow standard which may be mounted on any suitable base 10; said standard having a post 11 telescopically mounted t1: onnnn, orrnrnannnrnra, rnnnsrnvnnra.

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versely therethrough, as clearly shown in Figures 3, 4 and 5. This member 12 may be turned upon a lathe so as to have its outer surface of any desired contour; the bottom 14 having a cavity 15 in which fits the reduced upper end portion 16 of the post 11; said upper end portion bein of reduced diameter to provide a shou der 17 for abutment with the lower edge of the bottom portion 14 of the member 12. The member 12 has a central hole 18 bored downwardly therethrough; said hole being interrupted lby the hole 13 as clearl shown in Figure 5. By providing the ole 18, a screw 19 can be inserted through the bottom portion 14 into the end portion 16 of the post 11; said screw serving as a pivot to permit the head member to turn on the post but at the same time the head memher will be held against longitudinal separation from the post.

The member 12 has a slot 20 cut therein so as to provide a slit; said slot centrally entering and intercepting the to of the hole 13 and then extendingitowar the side as clearly shown in Figures 3 and 5. By thus cutting the member 12, it will be separated into two sections 21 and 22 above the hole 13; the section 21 being of less cross sectional area than the cross sectional area of the corresponding part of section 22. Thus, the section 21 is weaker and more flexible than the section 22. A screw 23 extends transversely through the sections 21 and 22. A knob 24, which may be made of wood, has a metallic nut 25 inserted in its end for en gagement with the end of the screw said knob and nut lbearing against the side of the section 21.

From the foregoing description it is obvious that if the knob is turned on the screw, the section 21 will be moved toward the section 22 and the hole 13 will be contracted or become smaller. The hole 13 has a tubular lamp-su porting arm 26 slidably extending theret rough and adjustable therein so as to provide a slidable fit when the hole 13 is normal in size, and there is no clamping action brought to bear on the section 21. However, when the knob 24 is turned to flex the section 21 toward the sec tion 22 the contraction of the hole 13 will cause the tubular lamp-supporting arm 26 to be clamped to the head member 12 within the hole 13. p

By forming the slot 20 as above described, I have found in actual practice that it is quitean easy matter to turn the knob to firmly bind'j or clamp the lamp-supporting arm 26 to the head; and requires little power on the part of the operator. I also preferably cut away the material of the ,member' 12 at the bottom of the hole 13 asshown at 27 This cutting away can be done either by drilling a hole intersecting the bottom of the hole 13 as shown in Figures 3 and 5, or as shown in Figure 6, or the cutting away at this point can be done by a continuation of the saw cut from the slot 20.

If have specifically describedthe member 12 as constituting a head member on a post. However, it will be noted that this member, in so far as the hole 13, slot 20 and cut-away portion 27 are concerned, can be applied in various capacities, such for example as that illustrated in Figures 2 and 6 where two members embodying these features are coupled together; one being adapted to be clamped to a 0st while the other is capable of being c amped to a lamppost 11 in the hollow standard 9* can extend through the hole 13 and can be clamped therein by means similar to that described in connection with Figures 1, 3, 4 and 5. The members in Figures 2 and 6 have corresponding reference numerals to similar parts as described in connection'with Figures 1, 3, 4 and 5. In Figures 2 and 6 a member 12 has a transversely extending hole 13" extending therethrough and a slot 20", which leads from the side inwardly to enter and intercept the hole 13" at the middle of the thickness of the member '12 and the member 12 is secured to the member 12* by a screw 23 which extends across the slot 20 and is provided with a v knob 24; the opposite end of the screw 23 being secured to the member 12 between the screw head and a nut on the screw, at the hole previously described for insertion of I screw 19 through bottom portion 14. In tlns construction, the cavity 15 of the member 12 permits a convex portion 28 of the section 22 of the member 12 to extend there- 1n and thereby prevent lateral displacement between the members 12 and 12 as clearly shown in Figure 6. The hole 13 has a lampsupporting arm 26 extending therethrough and by tightening on the knob 24 the hole 13 will be contracted or reduced in diameter to clamp the arm 26'- and the member 12 substantially will be held against pivotal movement relatively to the member 12. However, if the knob 24*" is loosened, the arm 26 can be slid within the hole 13 and the member 12 can be swungv on the screw 23 as a pivot to providea swinging adjustment for the lamp-supporting arm 26.

Members such as 12, 12 and 12 can be quickly made and the sections, which are separated by the slots, will respond readily to the clamping action of the knob, since the formation of the slots relatively to the intersecting transversely extending hole renders the section of small cross section exceptionally flexible and at the same time insures strength when the parts are clamped together.

The lower portion of the post is expanded so as to resiliently and frictionally engage the inner surface of the hollow standard, as shown in Figures 7 and 8. To provide this construction I preferably use a. solid post and drill a hole 29 upwardly from the bottom end and also split the post to provide a longitudinal kerf as shown at 30; said split extending longitudinally so as to produce a bifurcated lower end. I preferably drill other holes 31 and 32 transversely through the post; said holes 31 and 32 intercepting the splits and the drilled hole 29. I then drive a wedge 33 into the hole 29 so that the upper end 34 of the wedge fits within the upper end of the split 30 as shown in Figure 7. This causes the furcations 35 to spread into frictional en agement with the inner surface of the standard 9 and is ordinarily sufiicient to provide resistance against accidental downward movement of the post. However, in some instances where the 0st supports a heavy weight I prefer to inc ude a looped spring such as shown at 36 in F i ure 8; said looped spring fitting within e bored hole 29 below the wedge 33.

While I have described my invention as taking a particular form, it will be understood that the various par-ts of my invention may be changed without departing from the spirit thereof, and hence I do not limit, in self to the precise construction set forth, but consider that I am at liberty to make such changes and alterations as fairly come within the scope of the appended claims.

Having thus described my invention, what claim as new and desire to secure by Letters Patent is i 1. An adjustable support including a hollow standard, a post telescopically fitting within the standard, and having a longitudinally extending hole therein and being split in the direction of its on and resilient'means dis d in said ole and separating said spht end transv spreading the same into frictional engagement with the inner surfaces of the standard; substantially as described.

ersely for mime 2. An justnble support n t g a, hollow standard, a, post telescopically fitting within the stander-d, and hevlng n'longitudinelly nding hole therein, and being split in the direction of the length, there being transverse holes in said dlMl across said split; and a. loop spring e" in said hole and forcing stud split end transversely for at 1 the into fricthe stanerd; substentiall as described.

In testimony whereof have signed my name to this specification in the presence of two subscribing witnesses.

MORRIS l t K. 

